Make sure you use SS nuts & bolts & that the nuts are locking (you know with the nylon bushing inside). I found 1" a little long but 1/2" too short. 3/4" would be best but Home Depot didn't have. Aluminum was very easy to cut, bend & file smooth. Smallest piece was 36" but after bending to fit underside of Topeak rack was easy to shorten "legs". You will find that you may have to gently force the "legs" to meet the holes in the frame but it is quite forgiving & easy to do. Predrilled with smaller bit. Good luck